The Isigny terroir has the advantage of a mild, damp climate, is near the sea and enjoys the benefits of the Bessin and Cotentin marshes. The cows which grazed there are fed on grass rich in iodine, beta carotene and trace elements.

The quality of Isigny butter reflects all these natural advantages. It is impossible to confuse it with any other butter. Beurre d'Isigny is yellow like buttercups, it has a faint taste of hazelnuts, and it is rich in Vitamin A. All these qualities were noted in the Appellation d'Origine Controle specification, which has been in force since 1986.